<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>

    <div id="root">
        <h1>今天的天气：{{info}}</h1>
        <button @click="changeWeather()">切换（调用方法）</button>
        <button @click="isHot = !isHot">切换（表达式）</button>
    </div>

</body>

<script type="text/javascript">
    const vm = new Vue({
        el: '#root',
        data: {
            isHot: true,
        },
        computed: {
            info(){
                return this.isHot ? '炎热' : '凉爽';
            }
        },

        methods: {
            changeWeather(){
                this.isHot = !this.isHot;
            }
        },
        
    });

    Vue.config.productionTip = false  //阻止 vue 在启动时生成生产提示。
</script>

</html>